1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.bcel.internal.generic;
  23 
  24 /**
  25  * Denotes an unparameterized instruction to load a value from a local
  26  * variable, e.g. ILOAD.
  27  *
  28  */
  29 public abstract class LoadInstruction extends LocalVariableInstruction implements PushInstruction {
  30 
  31     /**
  32      * Empty constructor needed for Instruction.readInstruction.
  33      * Not to be used otherwise.
  34      * tag and length are defined in readInstruction and initFromFile, respectively.
  35      */
  36     LoadInstruction(final short canon_tag, final short c_tag) {
  37         super(canon_tag, c_tag);
  38     }
  39 
  40 
  41     /**
  42      * @param opcode Instruction opcode
  43      * @param c_tag Instruction number for compact version, ALOAD_0, e.g.
  44      * @param n local variable index (unsigned short)
  45      */
  46     protected LoadInstruction(final short opcode, final short c_tag, final int n) {
  47         super(opcode, c_tag, n);
  48     }
  49 
  50 
  51     /**
  52      * Call corresponding visitor method(s). The order is:
  53      * Call visitor methods of implemented interfaces first, then
  54      * call methods according to the class hierarchy in descending order,
  55      * i.e., the most specific visitXXX() call comes last.
  56      *
  57      * @param v Visitor object
  58      */
  59     @Override
  60     public void accept( final Visitor v ) {
  61         v.visitStackProducer(this);
  62         v.visitPushInstruction(this);
  63         v.visitTypedInstruction(this);
  64         v.visitLocalVariableInstruction(this);
  65         v.visitLoadInstruction(this);
  66     }
  67 }